Lens-drilling machine



' Mar.' 6, 1923. 1,447,761. E. W. CLARKE. LENS DmLLxNG MACHINEE FILED JULY 2.1'920. 3 SHEETS`SHEET l.

, b N7@ #www ill l INVENTOR Mar. 6, 1923.

INVENTOR ATTORNEY 3 SHEETS-SHEET 2.

Edu/nz w. olaf/f@ Y B v E W CLARKE LENS DRILLING MACHINE. FILED JULYZ 1920 Mans, 192s.-

" 3 SHEETS-SHEET 3 Edward MTE INVENTOR ATTORNEY Patented Mar, 6, 1923.

PATENT oFFicE.

EDWARD We CLARKE, OF BUFFALO, NEW YORK.

LENS-DRILLING MACHINE.

Application filed July 2, 1920. Serial No. 393,518.

To all whom t may concern.: T

Be it known that I, EDWARD lV. CLARKE, a citizen of the United Stat-es, residing at Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Lens-Drilling Machines, of which the following is a specification.`

rOne objectof my present invention is the provision of a unitary lens drilling machine, adapted to be operated to the best advantage with the expenditure of a minimum amount of effort.

Another object of the invention is the provision of a lens drilling machine having in its standard a holder for drilling` fluid and also having` a dropper and means whereby with one hand the operator is enabled to dcpress the drilling bit and at the same time manipulatethe dropper for the proper placing of drilling fluid on the lens.

Another object is the provision is a drilling machine of a highly 'advantageous lens holder characterized by the capacity of to `enable the operatorwithone mounting of a lens to drill thesame half way through at one 'y side of the lens and then halil way throughl at the opposite side of the lens; the said holder being also characterized by its capacity to enable the operator on one mounting of the lens to drill both ends thereof, by its capacity to handle either flat or concavo-convex lenses, and by its capacity to bring about the drilling of a lens at one side Vor the other of the longitudinal center thereof. i

To the attainment of the foregoing the in- Y vent-ion consists in the improvement as hereinafter described and definitely claimed.

In the accompanying drawings, hereby made apart hereofz- A Figure 1 is a side elevation of a -lensdrilling machine constructed in accordance with my invention.-

Figure 2 is a vertical section showing the vdrill fluid container inthe lower portion of the machine standard and thefhereinafter described dropper positioned therein.

Figure 3 is a front elevation of the ma chine.

Figure 4 is a top plan view' of the machine.

Figures 5, G, 7 and S are detail views makor elastic quality.

ing clear the construction' of the lens holder and also making clear the capacity of the holder to handle` concavo-convex as well as flat lenses.

Figure 9 is an enlarged detail view of one of the clamp members. f

Figure 10comprises disconnected` views of parts included in the work holder.

Similar vnumerals of reference designate correspondingparts in all of the views of the drawings. y

Among other elements my novel machine comprises a base 1 to which is fixed a standard 2; the two being preferably integral. The lowerportion of the standard 2 is hollow to aHord a container 3 for drilling fluid,

and in the upper portion of the `wall of the` container is formed an opening Il normally closed by the body of a removable dropper 5. Vhen associated with lthe container 3 the said dropper 5 is arranged with its `handle 5X at one side of the lower port-ion of the standard .2, as shown in Figures 1 and `2, for `an important purpose hereinafter set forth.

Fixed to the standard 2 at an intermediate point in the .lengths thereof is a bracket t5 and carried by the said bracket 6 is an electric motor `7 on the armature shaft 8 of vhich is a circumferentially grooved puley 9.

Fixed to and extending forwardly from the upper portion of the standard 2 are arms 10 and 11 which are separated by an intervening spa-ce and are designed for the reception of the rotatable and rectilinearly v movable drill yspindle 12 which is provided at its lowerfaend with a-diamond bit '13 or an appropriate bit of any other type. Fixed on the spindle'12 and movable up and down i and about its axis in 'the intervening space alluded to is a. circumferentially grooved pulley 14 between which and the pulley 9 is arranged a band 15 possessed of stretching At the upper end of the standard 2 `is a crown section 16 with upstanding arms 17 and 18, and pivoted to the arm 17 and movable vertically in a bifurcationof the arm `1S is Aa lever 19, normally pressed upwardly by a spring 20. The said lever 19 is connected with the upper end of the spindle 12 `in the manner illustrated-fi. e., in such manner that the spindle 12 is free to rotate in and independently of the lever 19 and yet downward and upward movements of the lever' 19 will be attended by corresponding movements or" the spindle.

Connected toI and depending from the free end oi' the lever' 19 is a handle 21 `piovided at its lower end Vwith va hook 22. The.

said handle 21 with the hook 2:2 is arranged at the same side of the standard 2 vasthe before mentioned dropperv. F rom this it follows an important advantage lorfiny-iinpioveinent which consists in the ability of the' operator to' depress the spindle12'by the application of 4the'middle'iinger of one bracket 23 also carries an 'anvil 26 disposed .in vertical alineinent with the spindle 12 and bit 13.y yThe lens holder oi my improvelment is made up of the following elements,

' vizi; a pedestal member 27 fixed ontlie iront Vportion of the base 1 a swinging journal 23 vhaving a flattened end portion 29, pivoted at 3l). inthe member 27 and also vlia-ving 4stop*` portions 31 and knife `edge portions y The stop portions 31 are designed by cooperation with the member 27 to limit the swinging movements of thefjournal'QfS forwardly andrearwardly, and the knife edge portions 32, 'Figures 1 and 3, are for co- `operation with'notches 33 in the 'lower end Vofthe tubular stem 34 of a ,yoke 35. The

said `notches 33 are diametrieall-y opposite cach otherv and from :this it follows that-by lifting the yoke35-to a slight extent,the said yoke maybe swung about the journal 28 to reverse position and may then be de' tachably secure-d in such position by releasing the yoke so that on downward movement thereof the knife edge portions 32 will be received in the notches 33.-* In addition `to `the `parts thus far enumerated the lens iholder'comprises a'rotat'a-ble cradle 36. Said" cradle 36 is "arranged between y the arms of the yokey35 and is provided with trunni'ons 37-l journaled in'tlieeird -portionsof lthe 'yoke' pand" provide'cb-at their 1outer ends with knu-rled linger piecesj'38.y vIn `its transverse 'center the ycradle '36 is provided with a stop -or abutment 39, Figure 6, and slidable on the cradle 3G at opposite sides of' the said v stop 39 are clamping members 40 which are connected together throughthe medium ot a i'etra'ctilevspring l1, Figure 3,1wliioh' tends to 4draw aniilyieldingly h oldtlie niem- :bers 4() against the opposite sides of the stop 39.` On `each clamping member el() are two lens engaging-pegs 42 which are formed 0f plastic material, wood or any other malens on said'members.

terial that will not be liable to' ychip the edges of the lenses. One of the said pegs is shown enlarged in Figure 9. IEach of the said pegs l2 is provided at its inner side and at Van intermediate `point of its 'height with a rest 43, and the upper portion et' the inner face of each peg is preferably in-l clined; inwardly Vtoward the upper end and peg'irom the inner edge of the rest 43. This'pi'ovision is advantageous in'asini'icli as it enablestlie group of pegs 43 to securely' retain a concavo-eonvex lens when said lens is superimposed on the rests L13, andthe clamping members eCare held bythe spring 41 under yielding pressure against the `edge 'of the lens. The upper sidesfof the clam-pying'members'flll are iiat inrorder to support 'two flat lenses which may be arranged edgev wise between the' pegs 422' and the lowerniostoneo'f which may" be arranged flatwise `directly "against thev said flat sides of the members 40. fr i l The upper side offthe'cradle 36 ispreiera- `bly graduated in millimeters, `as indicated by lst kso that by referring to the said gradnations and `properly positioning the clamping members lll with respect thereto the operator can drill a hole .in a. lens at various' predetermined distances from the llongitudinal center of the lens. :The inner corners ofthe clamping members 40 are preferably, though not necessarily,,iecessed s indicated by 45 and shown bvedottedlines in FigureG, to vfacilitate-the placing of a In the 4practical operation of :the machine and .'in the practical manipulation or `use or the `lens holder referred to,v it will be apparent that when either a Vilat lens lor a concavoconvex lens isv positioned between the pegs 42 on vthe clamping members 40 carried by the cradle 36,"3theilens ymay be drilled at `'both sides and nearv'bothends thereof, and this with the greatest iacility.- This will `be better understood when it is stated=thatwith -Ithe lens properly mounted the lens may be swung with the yoke 35 so `that one'oiiits end portions will be positioned between the anvil-26` and the bit 13. l/Vhile `the lens is thus positionedit may 'be drilled yhalfway through its thickness." ,Then-by the operator turning the cradle 36 about its axis the opposite side and opposite end portion. ofthe -lens may vbeI presented to the bit 13 ,to be bored through one half of its'fthickness. Then by the operator lifting/the yoke -35 and turning the yoke about its axis on the journal 28 `and then depressing vthevyoke to. l

reeng'age the samefwith the knifey edge portions 32 the lens will bepositioned tor the presentation o'lthe opposite side of the lirst-` named end of the lens tothe bit 137 and then by turning the cradle 36v about its ,axis the operator isA enabled to present to thefbit 13 the yopposite .side of the second-named end portion of the lens. In this Way the desired drilling of the lens irst at one side and then at the opposite side thereof may be eXpeditiously and easily accomplished. Again it will be appreciated in the drilling of concavo-convex lenses the operator is enabled by takinnf hold of one or both of the ringer pieces 88 to adjust and hold the lens so that the drill bit 13 will operate in a line at right anglesl to the plane of the surface ofthe lens as is always" desirable. Incidental tov the drilling operation the operator is enabled to depress the spindle 12 by the application olE the middle finger of one hand to the hook 22 o1c the .handle 21 while with thc thumb and index linger or' the same hand he manipulates the dropper for the proper application of drilling fluid to the lens that is being drilled. This will be appreciated as an important advantage when facility and expedition of operationaretalren into consideration.

It will be further apparent from the foregoin@ that my improvement presents an unitary, mobile lens drilling machine adapted to be readily handled as a Whole.

Having'described my invention, what I claim and desire to secure by Letters Patent, is

A lens holder comprising a pedestal, a swinging journal pivoted to the pedestal and having a stop portion to engage the pedestal and also having knife edge portions, a yoke having a tubular stem notched to receive said knife edge portions and movable vertically on and about the journal, a cradle mounted to turn about its axis between the `arms 0l' the yoke and having a inger piece, clamp members slidablc on said cradle, a ret-ractile spring connecting Said clamping members, pegs on the clamp-ing members and having rests and also having their inner faces inclined inwardly above the rests, and a stop on the cradle and against which the clamping members are normally held; the said cradle being graduated.

In testimony whereof I affix my signature.

EDl/VARD W. CLARKE. 

